Pixel decimation of RD-cost functions in the HEVC encoder

Ahmed Hamza, Abdelrahman Abdelazim, Djamel Ait-Boudaoud

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Abstract

We present and analyse schemes for the improvement of computational complexity in the current HEVC (High Efficiency Video Coding) standard, by a subsampling of the block-matching distortion cost functions used in the encoding process. HEVC improves on prior standards considerably in coding (compression) efficiency, with a large set-back in time complexity for inter and intra prediction processes and mode decisions. We alleviate this by reducing the number of calculations per decision in all modes of prediction, through pixel decimation in the SAD and SSE distortion cost functions. Experimentation with different patterns shows significant encoding time reduction with these schemes, used in tandem with built-in Fast Encoding optimizations in the HEVC reference implementation.
Original languageEnglish
DOIs
Publication statusPublished - 18 Feb 2016
EventIS&T International Symposium on Electronic Imaging Science and Technology - California, San Francisco, United States
Duration: 14 Feb 201618 Feb 2016

Conference

ConferenceIS&T International Symposium on Electronic Imaging Science and Technology
Country/TerritoryUnited States
CitySan Francisco
Period14/02/1618/02/16

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